Exam 3 Name
Math 143 April 15, 2009
Show all work and simplify all answers. Give exact numerical answers unless you are instructed
to make a decimal approximation. NPC means no partial credit.
1. [21 points]
(a) [NPC] Simplify log41
8.
(b) [NPC] Find all intercepts for the graph y= (1.2)x.
x-intercept(s):
y-intercept:
(c) [NPC] Fill in the blank: the functions f(x) = 2xand g(x) =
are inverses of one another.
(d) [NPC] Express log57 as a decimal number. Round your answer to the nearest one-
hundredth.
(e) [NPC] True or false: log3(5x2) = 2 log3(5x)
(f) [NPC] Find the domain of f(x) = ln(5 −x).Express your answer in interval notation.
I need to solve the inequality:
The domain is
1
